darby



,072. Patented Feb. 7, I899. H. DARBY.

BICYCLE BRAKE.

'Apphmtmn filed. July 20 1398 4 Sheets8heat I.

(No Model.)

INVENTDI? WITNESSES D- Patented Feb. 7.11899.

H. DARBY.

BICYCLE BRAKE.

(Application filed July 20, 1898.) (No Model.) 4 Sheets-Sheet 2.

m: NORRIS FEYEIS co. PndTuLn-um wunmarom A c.

No. 6l9,072. Patented Fab. 7, I899. H. DARBY.

BICYCLE BRAKE.

Applic'ation fllad July 20, 1898.) (No Model.) 4 Sheats-Sheet 3.

WITNESSES No. 6l9,072. Patented Feb. 7, I899.

H. DARBY.

BICYCLE BRAKE.

(Application filed July 20, 1898.) (No Model.) 4 Sheets-$heat 4'.

rm: uoluus PETERS co. PNOYOAJWO wunmumm u. c,

' UNITED STATES PATENT OFFICE.

HENRY DARBY, OF LONDON, ENGLAND, ASSIGNOR TO J OI-IN HENRY PUNCHARD, OFSAME PLACE.

BICYCLE-BRAKE.

SPECIFICATION forming part Of Letters ZPatent No. 619,072, datedFebruary 7, 1899.

Application filed July 20, 1898. Serial No. 686,466. (No model.)

ToaZZ whom it may concern.-

Be it known that I, HENRY DARBY, manufacturer, a subject of the Queen ofGreat Britain, residing at 249 Pentonville road, Kings Cross, London,England, have invented certain new and useful Improvements in orBelating to Band-Brakes for Bicycles or other Road-Vehicles, of whichthe following is a specification.

This invention relates to band-brakes for bicycles or otherroad-vehicles, the object being to provide a brake which will act on aband-wheel on the drivi n g-shaf t or other shaft or wheel of thevehicle, and especially on the crank-axle or driving-shaft of asafety-bicycle of the present well-known type, and, furthermore,comprising certain details of improvement in the mechanism for andmanner of operating said brakes, the present invention being veryeifective, though simple, and capable of being easily fitted to bicyclesor other road-vehicles either during building or after same have beenbuilt. a

The present invention is as follows, and by way of example I willproceed to describe same with reference to the drawings hereunto annexedas applied to an ordinary safety-bicycle with chain driving-gear andhaving a drop frame, or what is known as a ladys machine.

Figure 1 is a side view of a ladys bicycle having a band-wheel andband-brake fitted thereto according to the present invention. Fig. 2 isa local view, on a greatly-enlarged scale, of said band-wheel andband-brake and connected mechanism. Fig. 3 is a plan view of Fig. 2-1.6., looking in the direction of the arrow 3, Fig. 2. Fig. 4 is a similarview to Fig. 2, showing a modified arrangement. Figs. 5 and 6 show theconstruction of the brake-rodj', adjustable as to its length.

A band-wheel a is fixed on the crank-axle or crank drivingshaft b oneither or both sides of the bottom bracket 0, or, if desired, thisband-wheel a may be fixed or formed on the sprocket-wheel (not shown) onsaid driving-axle b. In the case illustrated the bandwheel a is mountedon the opposite side of the bottom bracket to the chain driving-wheel.(Not shown.) Around or partly around this band-wheel a a band-brake disprovided, one end d of said band-brake (Z being pivoted or secured to afixed poi11t-viz., a laterally-extending pin e, carried on a suitableclip or device capable of being clipped or adjustably secured in anysuitable position on the lower tube a: of the drop-frame, such clip orclipping appliance being of any suitable character advantageouslyadapted to be readily sprung over or placed in position on said tube a:and then screwed up tightly thereon by means of a screw-nut or pinchingscrew or screws. For instance, such pin 6 may-advantageously be carried,as shown in the drawings, on a mount consisting of two parts 6' and 6adapted to be screwed together by the screws 6*, by which means the clipcan be firmly fixed in-the desired position on the tube on. The other oroperated end (1 of said band-brake d is pivoted or otherwise suitablyattached to a laterally-extending pin f, like a crank-pin on a rockingarm or bell-cranklike device g, one end or arm 9 of which device g ispivoted or adapted to oscillate on a pin it between the center I) andthe perimeter of the band-brake wheel a, this point it beingadvantageously just a little within said perimeter, (see Figs. 1 and 2,)the pin or support h on which said crank or rocking arm g turns beingcarried on an adjustable clip or device capable of being clipped orfixed onto the lower end of the saddle-pillar y at any desired distancefrom the bottom bracket 0. For instance, a clip in two parts h h(similar to the aforesaid clip 6' e2) carrying the pin h, may be firmlyfixed to the tube 3 by the pinching-screws 71*. Thus each mount 6 and f,carrying the ends (1 d of the band-brake d, respectively, is capable ofadjustment by means of the aforesaid independent clips or clippingdevices 6 e and h if, this provision of these independent clipssupporting the two ends of the brake-band (Z having many advantages,especially as they enable bandbrakes according to the present inventionto be fitted to existing machines, although, if desired, in building newmachines with the present improvements applied thereto such mounts maybe formed on or permanently at-' tached to the frame.

The aforesaid crank or rocking arm or leverg is extended beyond saidcrank-pinf, and such extension 9* is advantageously curved rearwardly,and at this curved or outer end 9* has one end of a springz' connectedthereto, the other end of such springt' being fixed at i to the frame-t.e., to the back forks 2- so that the tendency of such springi istherefore to pull said rocking arm g rearwardly and thereby hold thebrake-band d off.

In the case illustrated the device 9 is rocked and the band cl therebyapplied to the wheel a by means of the rod j, pivoted to the arm 9 ofthe bell-crank-like device g, and by putting said brake-operating rodjin compression by any suitable connection from the brake-lever k on thehandle-bars or by other suitable means thereby the said arm 9 (of thedevice g) is forced downward in the direction of the arrow j (see Fig.2) and thereby the pin f is swung or moved toward the pin 6, andconsequently the brake-band d is by a very small movement of the rod jcaused to tightly grip around the brake-wheela, or instead of thebrake-operating rod j being'put in compression the same may by anysuitable mechanism be put in tension, and the lower end of saidbrake-rod j in such case would be connected to the rear or curved endg*. of the device g, (the arm 9 being dispensed with,) so that when thebrake-operating rod j is pulled up or moved forwardly by thebrake-operating handle or lever in any suitable mannerfor instance, ashereinafter described-thereby the device 9 is rocked forwardly and theband d applied to the wheel a, or this rocking device or crankarrangement g may be rocked or pulled forwardly,

(against the action of the aforesaid spring t',) so as to put on thebrake by any suitable means operated in any suitable manner by therider. on the handle-bars may be caused to pull up thevertically-descending rod j, Fig. 1, on the head, (instead of forcingthe same down, as

usual,) and this may be done in any suitable manner, but advantageouslyby prolonging said brake-lever is to the opposite side of the head orsteering post and there pivoting same. For instance, the same may behinged or pivoted to a suitable clip attached to the handle-bar, and thevertical descending rod j, hooked or attached direct to said brakeleveris, would thus be pulled up direct by the latter, the lower end of saiddescending rod j being connected to a bell-crank(not shown) carried onan adjustable mount clipped to the head of the machine, another rod orconnection passing direct from said bell-crank to the aforesaidrearwardly-curved end g* of the crank or rocking device g, by which theband-brake is applied, as herein- .before explained.

Fig. 4 shows the band-brake d carried at the points 6 and f, whichlatter are respectively mounted or supported on clips 6 and Forinstance, the brake-lever h, fixed to the tubes at and y, respectively,in a similar manner to that described with reference to Figs. 1 to 3,only in the case illustrated in Fig. 4 the lever or crank device 9 ispivoted at the point It outside the perimeter of the brake-wheel a, thebrake-operating rod j being put in tension and thereby applying the band01 to the wheel a, the spring 71, connected with the back forks .2,serving to normally hold the brake off, this modification being shownfor the purpose of illus trating that the band-brake (1, supported onadjustable clips or mounts, such as e e and h h may be usedin othermanner to that shown in Figs. 1 to 3.

In carrying the present invention into practice I find it advantageousto attach (by brazing, riveting, bolting,or in other suitable mannersecuring) the pedal-crank m rigidly to the brake-band wheel ct inasimilar manner to that in which the other crank (not shown) is nowusually attached to the chain-wheel, as is wellknown and will be readilyunderstood in the cycle trade. This attachment of the pedalcrank m tothe brake-wheel a forms no part separately, however, of the presentinvention.

In Figs. 5 and 6 I have illustrated the vertically descending rod jformed adjustable in its length, Fig. 5 showing the two parts locked andheld together to form a rigid vertical rod, while Fig. 6 shows the twoparts separated. In order to make the said vertical descending rod jadjustable in its length between the brake-operating lever is on thehandle-bars and the aforesaid bell-crank (not shown) near thefork-crown, according to the present invention I may form the same intwo parts m and n, the ends of which overlap some distance where theymeet, one such overlapping end on being provided with a series of holesm and theother overlapping end a with a corresponding projection n (orprojections) adapted to enter in such hole or holes m, and when thesetwo overlapping ends on and n have been laid together in the requiredposition a loose sleeve 0 is then slid over same and same is there heldin position, so as to lock and hold these overlapping ends m and nclosely together, and advantageously provided with means to hold saidsleeve 0 firmly in position-for instance, by screwing-or same may beprovided with a set-screw or pinching-screw p or lock-nut or othersuitable means; or these overlapping ends 1% and n may be provided withangular teeth or have two racks adapted to fit closely together, so thatwhen laid together and secured by the sleeve 0 aforesaid thereby thelength of said vertically-descendin g rod j can be vertically adjusted.

Having now particularly described and ascertained the nature of the saidinvention and in what manner the same is to be performed,

I declare that what I' claim is- In a brake, the combination with theframe of a vehicle provided with a bottom bracket and with frame-tubesdiverging therefrom, a

shaft journaled in said bracket and a bandapplying the brake-band tosaid band-Wheel, wheel mounted on said shaft, of independentsubstantially as set forth. clips mounted on the diverging tubes of saidi 7 T frame on each side of thebearing for said shaft, HENR1 DARB1 meansfor adjusting the clips independently \Vitnesses: on said divergingtubes, a brake-band sup- H. BORKLEAR,

ported at each end of said clips, and means for EDWIN GANDER.

